基于FWD的沥青路面动态弯沉温度修正系数
|
摘要
基于不同沥青路面的结构厚度和温度参数,对FWD实测的动态弯沉计算结果进行修正研究。按照分阶段函数拟合方法,建立弯沉修正系数与路面结构厚度、温度的两参数关系模型;该模型充分考虑沥青混合料模量的温度敏感性,可以保证当结构层厚度为0℃或温度为20℃时,弯沉修正系数为1,当温度升高或降低时,修正系数趋于一个稳定的最小值或最大值。此模型具有明确的物理意义,可更好地反映出路面材料实际力学状态,使弯沉参数的判断和评价更为科学、有效。
Based on the structural thickness and temperature parameters of different asphalt pavements,the correction studies on dynamic deflection based on FWD measured data were carried out. By using the fitting method of multi-phase function,a two-parameter model of deflection correction coefficient considering the thickness of pavement structure and the temperature was established. In this model,the sensitivity of asphalt mixture modulus to temperature was taken into account sufficiently,which can ensure that when the thickness of structural layer is 0℃ or the temperature is 20℃,the correction coefficient of pavement deflection is 1,and when the temperature is increased or decreased,the correction coefficient tends to a stable minimum or the maximum value. This model has a clear physical meaning,can reflect the actual states of the pavement materials very well,and make the judgment and evaluation on deflection parameters more scientific and effective.
Based on the structural thickness and temperature parameters of different asphalt pavements,the correction studies on dynamic deflection based on FWD measured data were carried out. By using the fitting method of multi-phase function,a two-parameter model of deflection correction coefficient considering the thickness of pavement structure and the temperature was established. In this model,the sensitivity of asphalt mixture modulus to temperature was taken into account sufficiently,which can ensure that when the thickness of structural layer is 0℃ or the temperature is 20℃,the correction coefficient of pavement deflection is 1,and when the temperature is increased or decreased,the correction coefficient tends to a stable minimum or the maximum value. This model has a clear physical meaning,can reflect the actual states of the pavement materials very well,and make the judgment and evaluation on deflection parameters more scientific and effective.
引文
[1]郑元勋,熊晓莉,黄静卿.FWD作用下沥青路面动态弯沉数值分析[J].郑州大学学报:理学版,2012,44(2):120-124(Zheng Yuanxun,Xiong Xiaoli,Huang Jingqing.Numerical study of dynamic deflection of asphalt pavement under FWD[J].Journal of Zhengzhou University:Natural Science Edition,2012,44(2):120-124(in Chinese))
[2]康海贵,郑元勋,蔡迎春,等.基于FWD的沥青路面弯沉及反算模量的温度修正[J].中外公路,2007,27(6):43-46
[3]JTG E60—2008公路路基路面现场测试规程[S].北京:人民交通出版社,2008(JTG E60—2008 Field test methods of subgrade and pavement for highway engineering[S].Beijing:China Communications Press,2008(in Chinese))
[4]JTG D50—2006公路沥青路面设计规范[S].北京:人民交通出版社,2006(JTG D50—2006 Specifications for design of highway asphalt pavement[S].Beijing:China Communications Press,2006(in Chinese))
[5]宋小金,曾梦澜,王林.沥青路面动态弯沉值的温度修正方法研究[J].公路交通科技,2016,33(1):22-26(Song Xiaojin,Zeng Menglan,Wang Lin.A method of temperature correction for asphalt pavement dynamic deflection[J].Journal of Highway and Transportation Research and Development,2016,33(1):22-26(in Chinese))
[6]陈森.沥青路面FWD标准检测规程与弯沉温度修正研究[D].重庆:重庆交通大学,2011
[7]AASHTO guide for design of pavement structures:part III pavement design procedures for rehabilitation of existing pavements[S].Washington,D.C.:American Association of State Highway and Transportation Officials,1993
[8]陈飞.沥青路面FWD弯沉温度修正研究[D].北京:交通部公路科学研究院,2006(Chen Fei.Research on temperature correction of FWD’s deflection for asphaltpavement[D].Beijing:Research Institute of Highway Ministry of Transport,2006(in Chinese))
[9]查旭东,王秉纲.基于同伦方法的路面模量反算研究[J].中国公路学报,2003,16(1):1-5(Zha Xudong,Wang Binggang.Backcalculation of modulus for pavements based on homotopy method[J].China Journal of Highway and Transport,2003,16(1):1-5(in Chinese))
[10]Timm D H,Newcomb D E.Perpetual pavement design for flexible pavements in the US[J].International Journal of Pavement Engineering,2006,7(2):111-119
[11]Lytton R L,Pufahl D E,Michalak C H,et al.An integrated model of the climatic effects on pavements[R].Texas:Texas Transportation Institute,1993
[12]查旭东.路面结构层模量反算方法综述[J].交通运输工程学报,2002,2(4):1-6(Zha Xudong.Summary of backcalculation methods of pavement layer moduli[J].Journal of Traffic and Transportation Engineering,2002,2(4):1-6(in Chinese))
[13]Pellinen T K,Witczak M W,Marasteanu M,et al.Stress dependent master curve construction for dynamic(complex)modulus[J].Journal of the Association of Asphalt Paving Technologists,2002,71:281-309
[14]徐发琼,高军会.半刚性基层沥青路面弯沉温度修正系数K值研究[J].中外公路,2011,31(5):63-67
[2]康海贵,郑元勋,蔡迎春,等.基于FWD的沥青路面弯沉及反算模量的温度修正[J].中外公路,2007,27(6):43-46
[3]JTG E60—2008公路路基路面现场测试规程[S].北京:人民交通出版社,2008(JTG E60—2008 Field test methods of subgrade and pavement for highway engineering[S].Beijing:China Communications Press,2008(in Chinese))
[4]JTG D50—2006公路沥青路面设计规范[S].北京:人民交通出版社,2006(JTG D50—2006 Specifications for design of highway asphalt pavement[S].Beijing:China Communications Press,2006(in Chinese))
[5]宋小金,曾梦澜,王林.沥青路面动态弯沉值的温度修正方法研究[J].公路交通科技,2016,33(1):22-26(Song Xiaojin,Zeng Menglan,Wang Lin.A method of temperature correction for asphalt pavement dynamic deflection[J].Journal of Highway and Transportation Research and Development,2016,33(1):22-26(in Chinese))
[6]陈森.沥青路面FWD标准检测规程与弯沉温度修正研究[D].重庆:重庆交通大学,2011
[7]AASHTO guide for design of pavement structures:part III pavement design procedures for rehabilitation of existing pavements[S].Washington,D.C.:American Association of State Highway and Transportation Officials,1993
[8]陈飞.沥青路面FWD弯沉温度修正研究[D].北京:交通部公路科学研究院,2006(Chen Fei.Research on temperature correction of FWD’s deflection for asphaltpavement[D].Beijing:Research Institute of Highway Ministry of Transport,2006(in Chinese))
[9]查旭东,王秉纲.基于同伦方法的路面模量反算研究[J].中国公路学报,2003,16(1):1-5(Zha Xudong,Wang Binggang.Backcalculation of modulus for pavements based on homotopy method[J].China Journal of Highway and Transport,2003,16(1):1-5(in Chinese))
[10]Timm D H,Newcomb D E.Perpetual pavement design for flexible pavements in the US[J].International Journal of Pavement Engineering,2006,7(2):111-119
[11]Lytton R L,Pufahl D E,Michalak C H,et al.An integrated model of the climatic effects on pavements[R].Texas:Texas Transportation Institute,1993
[12]查旭东.路面结构层模量反算方法综述[J].交通运输工程学报,2002,2(4):1-6(Zha Xudong.Summary of backcalculation methods of pavement layer moduli[J].Journal of Traffic and Transportation Engineering,2002,2(4):1-6(in Chinese))
[13]Pellinen T K,Witczak M W,Marasteanu M,et al.Stress dependent master curve construction for dynamic(complex)modulus[J].Journal of the Association of Asphalt Paving Technologists,2002,71:281-309
[14]徐发琼,高军会.半刚性基层沥青路面弯沉温度修正系数K值研究[J].中外公路,2011,31(5):63-67